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arXiv · 2107.12314

Measurement of Spin Density Matrix Elements in $\Lambda(1520)$ Photoproduction at 8.2-8.8 GeV

GlueX Collaboration·S. Adhikari·C. S. Akondi·M. Albrecht·A. Ali·M. Amaryan·A. Asaturyan·A. Austregesilo·Z. Baldwin·F. Barbosa·J. Barlow·E. Barriga·R. Barsotti·T. D. Beattie·V. V. Berdnikov·T. Black·W. Boeglin·W. J. Briscoe·T. Britton·W. K. Brooks·E. Chudakov·S. Cole·P. L. Cole·O. Cortes·V. Crede·M. M. Dalton·T. Daniels·A. Deur·S. Dobbs·A. Dolgolenko·R. Dotel·M. Dugger·R. Dzhygadlo·H. Egiyan·T. Erbora·A. Ernst·P. Eugenio·C. Fanelli·S. Fegan·J. Fitches·A. M. Foda·S. Furletov·L. Gan·H. Gao·A. Gasparian·C. Gleason·K. Goetzen·V. S. Goryachev·L. Guo·M. Hagen·H. Hakobyan·A. Hamdi·J. Hernandez·N. D. Hoffman·G. Hou·G. M. Huber·A. Hurley·D. G. Ireland·M. M. Ito·I. Jaegle·N. S. Jarvis·R. T. Jones·V. Kakoyan·G. Kalicy·M. Kamel·V. Khachatryan·M. Khatchatryan·C. Kourkoumelis·S. Kuleshov·A. LaDuke·I. Larin·D. Lawrence·D. I. Lersch·H. Li·W. B. Li·B. Liu·K. Livingston·G. J. Lolos·K. Luckas·V. Lyubovitskij·D. Mack·A. Mahmood·H. Marukyan·V. Matveev·M. McCaughan·M. McCracken·C. A. Meyer·R. Miskimen·R. E. Mitchell·K. Mizutani·V. Neelamana·F. Nerling·L. Ng·A. I. Ostrovidov·Z. Papandreou·C. Paudel·P. Pauli·R. Pedroni·L. Pentchev·K. J. Peters
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Abstract

We report on the measurement of spin density matrix elements of the $\Lambda(1520)$ in the photoproduction reaction $\gamma p\rightarrow \Lambda(1520)K^+$, via its subsequent decay to $K^{-}p$. The measurement was performed as part of the GlueX experimental program in Hall D at Jefferson Lab using a linearly polarized photon beam with $E_\gamma =$ 8.2-8.8 GeV. These are the first such measurements in this photon energy range. Results are presented in bins of momentum transfer squared, $-(t-t_\text{0})$. We compare the results with a Reggeon exchange model and determine that natural exchange amplitudes are dominant in $\Lambda(1520)$ photoproduction.

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GlueX Collaboration, S. Adhikari, C. S. Akondi, M. Albrecht, A. Ali, M. Amaryan, A. Asaturyan, A. Austregesilo, Z. Baldwin, F. Barbosa, J. Barlow, E. Barriga, R. Barsotti, T. D. Beattie, V. V. Berdnikov, T. Black, W. Boeglin, W. J. Briscoe, T. Britton, W. K. Brooks, E. Chudakov, S. Cole, P. L. Cole, O. Cortes, V. Crede, M. M. Dalton, T. Daniels, A. Deur, S. Dobbs, A. Dolgolenko, R. Dotel, M. Dugger, R. Dzhygadlo, H. Egiyan, T. Erbora, A. Ernst, P. Eugenio, C. Fanelli, S. Fegan, J. Fitches, A. M. Foda, S. Furletov, L. Gan, H. Gao, A. Gasparian, C. Gleason, K. Goetzen, V. S. Goryachev, L. Guo, M. Hagen, H. Hakobyan, A. Hamdi, J. Hernandez, N. D. Hoffman, G. Hou, G. M. Huber, A. Hurley, D. G. Ireland, M. M. Ito, I. Jaegle, N. S. Jarvis, R. T. Jones, V. Kakoyan, G. Kalicy, M. Kamel, V. Khachatryan, M. Khatchatryan, C. Kourkoumelis, S. Kuleshov, A. LaDuke, I. Larin, D. Lawrence, D. I. Lersch, H. Li, W. B. Li, B. Liu, K. Livingston, G. J. Lolos, K. Luckas, V. Lyubovitskij, D. Mack, A. Mahmood, H. Marukyan, V. Matveev, M. McCaughan, M. McCracken, C. A. Meyer, R. Miskimen, R. E. Mitchell, K. Mizutani, V. Neelamana, F. Nerling, L. Ng, A. I. Ostrovidov, Z. Papandreou, C. Paudel, P. Pauli, R. Pedroni, L. Pentchev, K. J. Peters. 2021-07-26. Measurement of Spin Density Matrix Elements in $\Lambda(1520)$ Photoproduction at 8.2-8.8 GeV. https://doi.org/10.1103/physrevc.105.035201

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